Research Of Airflow Distribution Technology Of Electrostatic Precipitator--Experimental Analysis Of Factors Affecting Uniformaly Distribution Of Airflow

Airflow distribution is one of the important factors affecting the performance of electrostatic precipitator (EP) and airflow distribution technology (ADT) can improve the efficiency effectively and economically. Nowadays, with environment protection standards stricter and stricter, a great deal of items of alteration of old EP stare us in the face. Increasing the area of gathering dust and lengthen the electric field are usually used in real engineering to meliorate the effect, which always go with enlarging the investment of Phase I and the charge of operation for long ,but that is not permitted for much old equipments. While using ADT to make proper alteration on inlet or outlet can get much increase of efficiency of EP as much with less work. For economic and simple to practice, it can be applied into almost all items of EP and really be worth of studying by all EP researchers. But formerly the law of factors affecting airflow distribution is short of systematic experiment and summarization. Firstly, this paper summarizes all related achievements of ADT at home and abroad, then taking a certain 198m2 EP of steel factory as antitype, independently builds a set of ADT research model, which has much advantages such as easy to alter, complete function, convenient and rapid data disposal, precise test, short test period, few investment and good applicability.Moreover, by using of that model, this paper makes some validating parallelexperiments on three working conditions and proves that in model test using little wind speed can get as similar results as using large wind speed, distribution board has better performance on mending uniformity than trough board, and the number of distribution board need setting properly and more boards, not always better effect. At last, by importing orthogonal test method, this paper has a completely review of main factors affecting airflow distribution through 27 groups of experiments and gets the sequence of influence degree according to the analysis of range and variance: position of the third distribution board (9.1)> position of the first distribution board (4.8)> opening ratio of the second distribution board (4.5)> position of the second distribution board (3.5)> position of the trough board (3.1)> distance between the second and the third distribution board (2.4)> opening ratio of the first distribution board (2.4)> distance between the first and the second distribution board (2.3)> opening ratio of the third distribution board (2.2)> distance between two trough board (1.0). As an exception of the distance between two trough boards is a notable factor, the others are all especially notable factors. Thus an approximately outline has been found for model test and locale alteration of airflow distribution in EP.